Here are my decal tests, now that it's too late for the bass:
I decided to try to color over some of the colors with a silver sharpie and put them on backwards, along with the regular, non-sharpied ones facing the right direction. The logo is pretty small and the Sharpie was not fine-tipped, so you can definitely see where I colored outside the lines, but it's just a test. Also, I'm not going to continue spraying more finish over them because I'd like to use most of this wood for something and I don't want to give myself too much to sand off.
I'm kinda liking that outline one (top, left on the black limba). I also think everything showed up pretty nicely on the white side of the limba. Black shows up good on the mahogany as well. Turquoise really pops on the wenge when it has the silver behind it. The one above the turquoise is the one that matches what I put on the truss rod cover.
BassHappy, the mother of pearl decal is on the bottom left of the walnut. I like that the best of the silver or white ones. The one above it looks white, but is actually just silver Sharpie. One of the silver-ish ones on the white part of the limba might also be a pearl one, I can't tell for sure.
So, I'm thinking about buying one or both of these to potentially fill in decal outlines in the future:
Classic Metallic Pitt Artist Pens 3Ct Set (Design Memory Craft):Amazon:Home & Kitchen
Faber-Castell Artist Brush Pens (Set of 6) Color: Landscape:Amazon:Home & Kitchen
Any thoughts? (Hopkins?) They're India Ink, it says waterproof, lightfast, archival, and I like the color options (there are several other sets as well).